*** The Grolier Club Catalogue (see below) states that a T. Anderton, bookbinder, "Probably moved to Philadelphia before 1768 ibid. pg 120. and given that the History of American Manufacturers, ( vol I. 1868. pg. 193.) states that John came from England and set up business in New York as a binder, letter-case and pocket-book maker it seems likely that T. Anderton of New York is also John Anderton of Philadelphia.

(1764) "Lately arrived from England..Book-Binder, Letter Case, and Pocket
book Maker; Makes and sells wholesale and retail, all sorts of lettercases,
desk cases, traveling cases and traveling boxes either with or without
shaving equipages; Ladies traveling writing desks, fishing cases, solo cases.
The said T. Anderton, performs book-binding in its full perfection, in all
sorts of plain and rich bindings; marbles and gilds the edge of books, gilds
and letters libraries, or parcels of books, and rules paper or bill books,
day books, journals and ledgers &c. ( as exact to any pattern) but with
greater ellegancy that if taken from copper plate, and binds in parchment or
vellum either with or without Russian bands.... The New York Mercury,
September 24, 1764.

3." Lately arrived from England " the New York Mercury December 24 1764. also
in Catalogue of Ornamental Leather Bookbindings Executed in America prior to
1850. pg.119

Probably moved to Philadelphia before 1768 ibid. pg 120.

5. ** Bishop notes that a John Anderton, Bookbinder Phil. came to Phil. from New
York and that he had made pocketbooks etc, there. J. Leander Bishop History
of American Manufacturers, vol I. 1868. pg. 193